noun
atomic weapons; nuclear weapons
Refers to weapons that use atomic energy, such as atomic bombs. Often used in discussions of disarmament and warfare.
原子兵器の廃絶を訴えるデモが行われた。
A demonstration calling for the abolition of atomic weapons was held.
核兵器 is the more common modern term for 'nuclear weapons', while 原子兵器 is slightly older and more formal.
Compound of 原子 (げんし, 'atom') and 兵器 (へいき, 'weapons').